Preparation, analysis, and isothermal crystallization behavior of poly[1,3-bis(aminomethyl)cyclohexamethylene oxamide]

摘要

Poly[1,3-bis(aminomethyl)cyclohexaneoxamide] (PBAC2) was synthesized using 1,3-bis(aminomethyl)cyclohexane (BAC) and dibutyl oxalate (DO) via spray/solid-state polycondensation (SSP). The structure of the synthesized polyoxamide was confirmed by H-1-nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy. The weight average molecular weight (M-w) of the polyoxamides prepared was 1.35 x 10(5). The polyoxamides showed excellent thermal properties with glass transition temperature (T-g) of 150 degrees C, melting temperature (T-m) of 318 degrees C, crystallization temperature(T-c) of 253 degrees C, and initial degradation temperature (T-d) of 417 degrees C suggesting higher thermal stability than commercial polyamide 6 (T-d=378 degrees C). Kinetic studies of PBAC2 predicted a two-dimensional crystal growth. X-ray diffraction powder diffraction suggested that the polymer has high crystallinity. A saturated water absorption of 2.8 wt % was recorded for the new polyoxamide, giving it a competitive edge for applications in civil aviation, reinforced plastics, and electronics industry where precise dimensional stability and high thermal resistance properties are a priority. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46345.